Table 3: Forest plot of dietary alpha-linolenic acid (ALA), docosahexaenoic acid (DHA), eicosapentaenoic acid (EPA) intake and long-chain omega-3 intake versus total incidence of prostate cancer (Giovannucci et al. [11] removed).

Study name Subgroup within study Time point Statistics for each study     Rick ratio Lower limit Upper limit -value -value Risk ratio and 95% Cl Relative weight Schuurman ALA 1999 0.760 0.569 1.016 −1.854 0.064 6.50 Koralek ALA 2006 0.940 0.8100 1.090 −0.817 0.414 24.83 Park ALA 2007 0.920 0.835 1.014 1.683 0.092 58.07 Wallstrm ALA 2007 0.920 0.733 1.155 −0.719 0.472 10.60       0.914 0.848 0.984 −2.397 0.017   Schuurman DHA 1999 1.030 0.754 1.407 0.186 0.853 8.16 Park DHA 2007 0.990 0.895 1..96 −0.194 0.846 77.37 Wallstrom DHA 2007 1.290 1.020 1.631 2.129 0.033 14.47       1.032 0.944 1.128 0.692 0.489   Schuurman EPA 1999 1.000 0.735 1.360 0.000 1.000 9.19 Park EPA 2007 1.010 0.906 1.125 0.180 0.857 74.12 Wallstrm EPA 2007 1.280 1.019 1.608 2.120 0.034 16.68       1.050 0.956 1.152 1.021 0.307   Wallstrm Long-chain 2007 1.280 1.011 1.621 2.048 0.041 25.23 Chavarrq Long-chain 2008 1.090 0.950 1.250 1.231 0.218 74.77       1.135 1.008 1.278 2.093 0.036         1.004 0.960 1.050 0.178 0.859